[PATCH v2 0/2] eventpoll: Fix epoll_wait() report false negative

From: Nam Cao

Date: Sat May 30 2026 - 05:39:16 EST


Hi,

While staring at epoll, I noticed ep_events_available() looks wrong. I
wrote a small program to confirm, and yes it is definitely wrong.

This series adds a reproducer to kselftest, and fix the bug.

v2: Switch to seqlock solution

Nam Cao (2):
selftests/eventpoll: Add test for multiple waiters
eventpoll: Fix epoll_wait() report false negative

fs/eventpoll.c | 20 ++++++++-
.../filesystems/epoll/epoll_wakeup_test.c | 45 +++++++++++++++++++
2 files changed, 64 insertions(+), 1 deletion(-)

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2.47.3